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Both the name of the episode and the mystifying event that occurred, "The Pineapple Incident" refers to a season one plotline in which Ted (Josh Radnor) awakes from a night of heavy drinking to discover a brunette woman in bed with him and the tropical fruit on his nightstand. Though the woman's identity is later unearthed (Trudy), the pineapple's origins never are, prompting Marshall (Jason Segel) to exclaim near episode's end, "Damnit, Trudy, what about the pineapple?"
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In the ninth and final season premiere, The Mother (Cristin Milioti) befriends Lily (Alyson Hannigan) with a batch of peanut butter, chocolate and caramel cookies that both women – independent of each other – end up naming the .
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A trip to the local coffee shop in season two lands Barney (Neil Patrick Harris) the nickname "Swarley" after his drink is labeled incorrectly. Throughout the episode, he is subsequently called differing variations of the name, including "Swarlos" and "Swarles Barkley," before the gang agrees to drop it.
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When Ted learns that Chicago pizza spot Gazola's is closing down during season five, he suggests he and Marshall make one final road trip to it like they used to when attending Wesleyan University, subsisting only on jerky and Tantrum soda for the drive. Unaware that Ted is attempting to "bro out" with him, Marshall invites Lily along, causing Ted to kidnap Marshall from the bed and breakfast they'd stopped at midway so the pair can spend some alone time together at their once treasured spot.
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A drunken adventure the night before his wedding leads Barney to be found incapacitated by his friends the next morning, forcing the gang to desperately remember the ingredients of his Stinson Hangover Fixer Elixir in this ninth season episode. Thinking back on their past experiences, Ted, Marshall, Lily and Robin (Cobie Smulders) are able to recall Tantrum soda, Funyuns, grease and a banana on their own, but only a revived Barney can reveal the missing component: love.
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TAKING THE CAKE
While flying solo at the season one wedding of a friend, Ted hits it off with guest Victoria (Ashley Williams), whom he nearly kisses until she insists she'd rather keep their one night of flirting chaste. The next day, realizing he wants to pursue a relationship, Ted badgers members of the wedding party to learn her full identity until the bride inadvertently tips him off: Revealing the wedding cake was made by Buttercup Bakery, Ted remembers Victoria gave "buttercup" as a nickname, and reunites with the pastry chef.
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Having secretly sipped wife Lily's fruity cocktails for years, Marshall finally musters the courage to order his own at MacLaren's Pub in season eight, requesting an elaborate mix of coconut rum, peach schnapps, vanilla vodka, strawberry creme liqueur, cranberry juice and sugar garnished with maraschino cherries and served in a tall, stemmed glass with a swirly straw. Hoping to christen the drink the Minnesota Tidal Wave, Marshall is surprised to learn that the concoction already has a name: the Robin Scherbatsky, an ode to Robin's frequent orders.
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TASTE OF CHINA
Having essentially moved in with Marshall and Ted at the start of season one, Lily returns to her apartment with new pal Robin only to see that it has been transformed into a Chinese restaurant named Madame Chew's House of Dumplings. Per the owners, Lily's landlord passed away and since she never responded to notices, her belongings and furniture were put to use in the restaurant – Marshall's mix-tape even serves as the place's ambient music.
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In a bid to cheer up Marshall about his career prospects, the gang helps him search for the best burger in New York in a season four episode that also featured a guest appearance from Regis Philbin. Having tasted the burger eight years ago when he first moved to the city, Marshall failed to properly remember its location, causing present-day Ted, Lily, Barney, Robin, Marshall and Philbin, an equal enthusiast about the burger, to zigzag across the city until a chance encounter finally directs them to the right eatery.
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In season seven, Ted stumbles upon a costume shop with an indecent Halloween get-up displayed in the window – the slutty pumpkin. Having hit it off with a woman wearing the same ensemble six seasons earlier, he tracks down the last person to rent the outfit and comes face-to-face with his mystery lady: Naomi, played by guest star Katie Holmes. Turns out, Naomi has been searching for Ted too, but the sparks both parties experienced in season one fail to withstand the test of time.
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